Uplink Resource Timing Alignment for PSFCH-Based Channel Allocation
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Solution Overview
Problem
Inconsistent understandings of uplink channel resources between terminals and control nodes due to differing sidelink and Uu timings and subcarrier spacings, leading to ambiguity in the location of sidelink transmission resources and PSFCH, PUCCH, or PUSCH resources.
Innovation Solution
A method to determine a target uplink channel resource by aligning the understanding between terminals and control nodes using time domain locations based on time intervals and time domain locations of PSFCH, considering sidelink and Uu timings, subcarrier spacings, and timing offsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink timing and Uu timing are used independently for resource determination, then timing flexibility and adaptability are improved, but resource location consistency and reliability deteriorate due to misalignment between terminal and control node understandings
Solution Approach 1:
The patent introduces a timing offset parameter as an intermediary element that mediates between sidelink timing and Uu timing. This offset acts as a bridge to reconcile the timing differences, allowing the terminal to translate between the two timing systems and ensure that resource locations determined by the terminal match those understood by the control node, thus maintaining reliability while preserving timing flexibility
Solution Approach 2:
The patent changes the timing parameter by introducing a timing offset that adjusts the relationship between sidelink timing and Uu timing. By modifying this parameter, the system can account for timing differences without changing the fundamental independence of the two timing systems, thereby maintaining adaptability while achieving consistency in resource location determination
2Adaptability or versatility
If different subcarrier spacings are used for sidelink and Uu, then system adaptability and service diversity are improved, but timing precision and resource determination accuracy deteriorate
Solution Approach 1:
The patent addresses the timing precision issue by introducing an additional dimensional parameter - the timing offset - that operates alongside the subcarrier spacing differences. This extra dimension allows the system to compensate for timing inaccuracies caused by different subcarrier spacings without requiring the spacings themselves to be changed, thus preserving service diversity while improving timing precision through the offset adjustment
3Measurement precision
If timing offset compensation is implemented, then resource determination accuracy is improved, but system complexity and calculation overhead increase
Solution Approach 1:
The patent applies preliminary action by pre-determining the timing offset value through straightforward comparisons of timing relationships. Rather than implementing complex real-time compensation mechanisms, the system calculates the offset in advance based on simple timing comparisons, thereby achieving accurate resource determination while minimizing system complexity and avoiding the need for elaborate compensation algorithms
Data Source
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AI summary
The present invention provides a resource determining method and a communications device. The method includes: determining a time domain resource of a target uplink channel based on a time interval y2 and a first time domain location of a physical sidelink feedback channel PSFCH, or based on the time interval y2 and a second time domain location of the PSFCH, where the time interval y2 is a time interval between the PSFCH and the target uplink channel.